president obama also paused at 2:50 today to observe a moment of silence. he did in the private at the white house. the u.s. senate paused to remember the bombing victims and the busy trading floor at the new york stock exchange fell silent for a moment as well. the big remaining question, of course, is w and we spent the weekend talking pth people who knew the disbelief we heard nothing but disbelief about dzhokhar, the 19-year-old who was charged today, but some llo knew tamerlan, the older brother who was killed, had reason for concern. al amman lived in the apartment below tamerlan tsarnaev and he says three months ago the two of them argued about religion. >> he was explaining how the bible is a cheap copy of the koran and how it's used the american government to... as an excuse to invade other countries. al powmber he said that america's a colonial power ea trying to colonize the middle east and africa. and he also said that the most owsualties in afghanistan and iraq are innocent bystanders gunned down by american soldiers. >> pelley: did he seem ang